Kai Feng Cheng

US Patent:

7093079, Aug 15, 2006

Filed:

Dec 17, 2002

Appl. No.:

10/323200

Inventors:

Tuan M. Quach - Fullerton CA, US
Lily Pao Looi - Portland OR, US
Kai Cheng - Portland OR, US

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

G06F 12/08

US Classification:

711141, 711146, 711137

Abstract:

Machine-readable media, methods, and apparatus are described for processing coherent requests of a computing device comprising multiple cache nodes. In some embodiments, a coherent switch may receive from a requesting cache node a coherent request for a line of memory. The coherent switch may further issue snoop requests to one or more non-requesting cache nodes based upon whether a snoop filter bypass mode is enabled. In particular, the coherent switch when not in snoop filter bypass mode may obtain coherency data from a snoop filter and may issue snoop requests to zero or more non-requesting cache nodes based upon the coherency data obtained from the snoop filter. Further, the coherent switch when in snoop filter bypass mode may bypass the snoop filter and may issue snoop requests to all non-requesting cache agents.

US Patent:

7617329, Nov 10, 2009

Filed:

Dec 30, 2002

Appl. No.:

10/335001

Inventors:

Tuan M. Quach - Fullerton CA, US
Lily P. Looi - Portland OR, US
Kai Cheng - Portland OR, US

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

G06F 15/16

US Classification:

709253, 709230, 711118, 711131, 711140, 711141, 711146

Abstract:

A system includes a scalability port switch (SPS) and a plurality of nodes. The SPS has a plurality of ports, each port coupled to a node. Each port is connected to a scalability port protocol distributed (SPPD). A snoop filter in the SPS tracks which nodes may be using various memory addresses. A scalability port protocol central (SPPC) is responsible for processing messages to support coherent and non-coherent transactions in the system.